[eyal282]

You'll be amazed, I made a check and if this line had an HasEntProp attached to it, the plugin would be compatible with L4D2:

SetEntProp(g_iAttacker[client], Prop_Data, "m_iFrags", (GetClientFrags(g_iAttacker[client]) + 1));

I don't know the L4D2 equivalent and I'm too lazy to check but believe me when I say that most L4D2 servers use buy system and the only important thing is that all plugins acknowledged the new killer.

Edit: I don't guarantee it'll work flawlessly with a HasEntProp check but I'm quite sure.